If tip back bend and toe of heavy labial wire were increased, the molar anchorage preparation can be produced, this is a active reinforced anchorage. 若在颊侧管近中端给粗唇弓加弯末端内收弯及后倾曲,尚可使磨牙进行支抗预备,即起主动支抗加强效能。
The experiment also show the removable heavy labial wire anchorage system is better than Nance palatal arch and lip bumper. 实验研究也显示在阻止磨牙近中移动方面,该系统优于腭托及唇挡。
Conclusion Labial inclination of incisors can be effectively prevented with use of elastic traction and bend back of arch wire. 结论平直弓丝矫治技术排齐阶段使用弹性链状圈远中移动尖牙配合弓丝末端回弯,可有效预防切牙唇倾,加快排齐的速度。
Located in vestibule of mouth, the heavy labial wire did not oppress gum, influence facial appearance, make mouth unwell. 粗唇弓前方位于唇系带附着点(牙合)方的口腔前庭,既不压迫牙龈、强撑口唇,也不影响患者外观和口腔功能,口腔不适感小。